im模板界面支持放大预览图片

examples/hello-mui/css/mui.imageviewer.css

+.mui-imageviewer {
+	position: absolute;
+	position: fixed;
+	background-color: rgba(0, 0, 0, 0.9);
+	width: 100%;
+	height: 100%;
+	z-index: 99;
+	left: 0px;
+	top: 0px;
+	display: none;
+	opacity: 0;
+	-webkit-transition: all 0.6s ease-in-out;
+	transition: all 0.6s ease-in-out;
+	-webkit-transform-style: preserve-3d;
+	-webkit-backface-visibility: hidden;
+	overflow: hidden;
+	margin: 0px;
+	padding: 0px;
+	box-sizing: border-box;
+}
+.mui-imageviewer-mask {
+	position: absolute;
+	z-index: 11;
+	width: 100%;
+	height: 100%;
+	left: 0px;
+	top: 0px;
+	display: none;
+}
+.mui-imageviewer .mui-imageviewer-header {
+	position: absolute;
+	height: 45px;
+	width: 100%;
+	left: 0px;
+	top: 0px;
+	z-index: 10;
+	background-color: rgba(0, 0, 0, 0.5);
+	margin: 0px;
+	padding: 0px;
+	box-sizing: border-box;
+}
+.mui-imageviewer .mui-imageviewer-state {
+	display: block;
+	width: 100%;
+	height: 100%;
+	line-height: 100%;
+	color: #eee;
+	text-align: center;
+	font-size: 16px;
+	padding: 15px;
+}
+.mui-imageviewer .mui-imageviewer-header .mui-imageviewer-close {
+	position: absolute;
+	top: 5px;
+	right: 5px;
+	font-size: 32px;
+	color: #aaa;
+}
+.mui-imageviewer .mui-imageviewer-header .mui-imageviewer-close:active {
+	color: #FF5053;
+}
+.mui-imageviewer .mui-imageviewer-item {
+	width: 100%;
+	height: 100%;
+	left: 0px;
+	top: 0px;
+	position: absolute;
+	z-index: 0;
+	margin: 0px;
+	padding: 0px;
+	box-sizing: border-box;
+	-webkit-transition: -webkit-transform 500ms ease-in-out;
+	transition: transform 500ms ease-in-out;
+	display: table;
+	overflow: hidden;
+}
+.mui-imageviewer .mui-imageviewer-item-center {
+	-webkit-transform: translateX(0);
+	transform: translateX(0);
+}
+.mui-imageviewer .mui-imageviewer-item-left {
+	-webkit-transform: translateX(-100%);
+	transform: translateX(-100%);
+}
+.mui-imageviewer .mui-imageviewer-item-right {
+	-webkit-transform: translateX(100%);
+	transform: translateX(100%);
+}
+.mui-imageviewer .mui-imageviewer-item span {
+	display: table-cell;
+	text-align: center;
+	vertical-align: middle;
+	line-height: 100%;
+	font-size: 100%;
+	margin: 0px;
+	padding: 0px;
+	box-sizing: border-box;
+	overflow: auto;
+}
+.mui-imageviewer .mui-imageviewer-item img {
+	backface-visibility: hidden;
+	transform-origin: 50% 50% 0px;
+	max-width: 100%;
+}
+.mui-imageviewer-left,
+.mui-imageviewer-right {
+	position: absolute;
+	z-index: 2;
+	color: #aaa;
+	top: 50%;
+	margin-top: -18px;
+	font-size: 36px;
+}
+.mui-imageviewer-left {
+	left: 5px;
+}
+.mui-imageviewer-right {
+	right: 5px;
+}
+.mui-imageviewer-left:active,
+.mui-imageviewer-right:active {
+	color: #fff;
+}
\ No newline at end of file

examples/hello-mui/examples/im-chat.html

@@ -109,7 +109,6 @@
 			.msg-item .msg-user-img{
 				width: 38px;
 				height: 38px;
-				border: solid 1px #d3d3d3;
 				display: inline-block;
 				border-radius: 3px;
 				vertical-align: top;
@@ -398,7 +397,7 @@
 							});
 						}
 					};
-					var imageViewer = new $.ImageViewer('img', {
+					var imageViewer = new $.ImageViewer('.msg-content-image', {
 						dbl: false
 					});
 					var bindMsgList = function() {

examples/hello-mui/js/mui.imageViewer.js

+/**
+ * 图片预览组件
+ * varstion 0.4.0
+ * by Houfeng
+ * Houfeng@DCloud.io
+ */
+
+(function($, document) {
+
+	$.init({
+		gestureConfig: {
+			tap: true, //默认为true
+			doubletap: true, //默认为false
+			longtap: true, //默认为false
+			swipe: true, //默认为true
+			drag: true, //默认为true
+			hold: true, //默认为false，不监听
+			release: true //默认为false，不监听
+		}
+	});
+
+	var touchSupport = ('ontouchstart' in document);
+	var tapEventName = touchSupport ? 'tap' : 'click';
+	var enterEventName = touchSupport ? 'tap' : 'click';
+	var imageClassName = $.className('image');
+
+
+	//创建DOM (此函数是否可放在 mui.js 中)
+	$.dom = function(str) {
+		if (!$.__create_dom_div__) {
+			$.__create_dom_div__ = document.createElement('div');
+		}
+		$.__create_dom_div__.innerHTML = str;
+		return $.__create_dom_div__.childNodes;
+	};
+
+	//图片预览组件类
+	var ImageViewer = $.ImageViewer = $.Class.extend({
+		//构造函数
+		init: function(selector, options) {
+			var self = this;
+			self.options = options || {};
+			self.selector = selector || 'img';
+			if (self.options.dbl) {
+				enterEventName = touchSupport ? 'doubletap' : 'dblclick';
+			}
+			self.findAllImage();
+			self.createViewer();
+			self.bindEvent();
+		},
+		//创建图片预览组件的整体 UI
+		createViewer: function() {
+			var self = this;
+			self.viewer = $.dom("<div class='mui-imageviewer'><div class='mui-imageviewer-mask'></div><div class='mui-imageviewer-header'><i class='mui-icon mui-icon-closeempty mui-imageviewer-close'></i><span class='mui-imageviewer-state'></span></div><i class='mui-icon mui-icon-arrowleft  mui-imageviewer-left'></i><i class='mui-icon mui-icon-arrowright mui-imageviewer-right'></i></div>");
+			self.viewer = self.viewer[0] || self.viewer;
+			//self.viewer.style.height = screen.height;
+			self.closeButton = self.viewer.querySelector('.mui-imageviewer-close');
+			self.state = self.viewer.querySelector('.mui-imageviewer-state');
+			self.leftButton = self.viewer.querySelector('.mui-imageviewer-left');
+			self.rightButton = self.viewer.querySelector('.mui-imageviewer-right');
+			self.mask = self.viewer.querySelector('.mui-imageviewer-mask');
+			document.body.appendChild(self.viewer);
+		},
+		//查找所有符合的图片
+		findAllImage: function() {
+			var self = this;
+			self.images = [].slice.call($(self.selector));
+		},
+		//检查图片是否为启动预览的图片
+		checkImage: function(target) {
+			var self = this;
+			if (target.tagName !== 'IMG') return false;
+			return self.images.some(function(image) {
+				return image == target;
+			});
+		},
+		//绑定事件
+		bindEvent: function() {
+			var self = this;
+			//绑定图片 tap 事件
+			document.addEventListener(enterEventName, function(event) {
+				if (!self.viewer) return;
+				var target = event.target;
+				if (!self.checkImage(target)) return;
+				self.viewer.style.display = 'block';
+				setTimeout(function() {
+					self.viewer.style.opacity = 1;
+				}, 0);
+				self.index = self.images.indexOf(target);
+				self.currentItem = self.createImage(self.index);
+			}, false);
+			//关系按钮事件
+			self.closeButton.addEventListener(tapEventName, function(event) {
+				self.viewer.style.opacity = 0;
+				setTimeout(function() {
+					self.viewer.style.display = 'none';
+					self.disposeImage(true);
+				}, 600);
+				event.preventDefault();
+				event.cancelBubble = true;
+			}, false);
+			//处理左右按钮
+			self.leftButton.addEventListener(tapEventName, function() {
+				self.prev();
+			}, false);
+			self.rightButton.addEventListener(tapEventName, function() {
+				self.next();
+			}, false);
+			//处理划动
+			self.mask.addEventListener('touchmove', function(event) {
+				event.preventDefault();
+				event.cancelBubble = true;
+			}, false);
+			self.viewer.addEventListener('swipeleft', function(event) {
+				if (self.scaleValue == 1) self.next();
+				event.preventDefault();
+				event.cancelBubble = true;
+			}, false);
+			self.viewer.addEventListener('swiperight', function(event) {
+				if (self.scaleValue == 1) self.prev();
+				event.preventDefault();
+				event.cancelBubble = true;
+			}, false);
+			//处理缩放开始
+			self.viewer.addEventListener('touchstart', function(event) {
+				var touches = event.touches;
+				if (touches.length == 2) {
+					var p1 = touches[0];
+					var p2 = touches[1];
+					var x = p1.pageX = p2.pageX; //x1-x2
+					var y = p1.pageY - p2.pageY; //y1-y2
+					self.scaleStart = Math.sqrt(x * x + y * y);
+					self.isMultiTouch = true;
+				} else if (touches.length = 1) {
+					self.dragStart = touches[0];
+				}
+			}, false);
+			self.viewer.addEventListener('touchmove', function(event) {
+				var img = self.currentItem.querySelector('img');
+				var touches = event.changedTouches;
+				if (touches.length == 2) {
+					event.preventDefault();
+					event.cancelBubble = true;
+					var p1 = touches[0];
+					var p2 = touches[1];
+					var x = p1.pageX = p2.pageX;
+					var y = p1.pageY - p2.pageY;
+					self.scaleEnd = Math.sqrt(x * x + y * y);
+					self._scaleValue = (self.scaleValue * (self.scaleEnd / self.scaleStart));
+					//self.state.innerText = self._scaleValue;
+					img.style.webkitTransform = "scale(" + self._scaleValue + "," + self._scaleValue + ") "; // + " translate(" + self.dragX || 0 + "px," + self.dragY || 0 + "px)";
+				} else if (!self.isMultiTouch && touches.length == 1 && self.scaleValue != 1) {
+					event.preventDefault();
+					event.cancelBubble = true;
+					self.dragEnd = touches[0];
+					self._dragX = self.dragX + (self.dragEnd.pageX - self.dragStart.pageX);
+					self._dragY = self.dragY + (self.dragEnd.pageY - self.dragStart.pageY);
+					img.style.marginLeft = self._dragX + 'px';
+					img.style.marginTop = self._dragY + 'px';
+					//img.style.transform = "translate(" + self._dragX + "px," + self._dragY + "px) " + " scale(" + self.scaleValue || 1 + "," + self.scaleValue || 1 + ")";
+				}
+			}, false);
+			self.viewer.addEventListener('touchend', function() {
+				self.scaleValue = self._scaleValue || self.scaleValue;
+				self._scaleValue = null;
+				self.dragX = self._dragX;
+				self.dragY = self._dragY;
+				self._dragX = null;
+				self._dragY = null;
+				var touches = event.touches;
+				self.isMultiTouch = (touches.length != 0);
+			});
+			// doubletap 好像不能用
+			self.viewer.addEventListener('doubletap', function() {
+				var img = self.currentItem.querySelector('img');
+				if (self.scaleValue === 1) {
+					self.scaleValue = 2;
+				} else {
+					self.scaleValue = 1;
+				}
+				self.dragX = 0;
+				self.dragY = 0;
+				img.style.marginLeft = self.dragX + 'px';
+				img.style.marginTop = self.dragY + 'px';
+				img.style.webkitTransform = "scale(" + self.scaleValue + "," + self.scaleValue + ") "; //+ " translate(" + self.dragX || 0 + "px," + self.dragY || 0 + "px)";
+				self.viewer.__tap_num = 0;
+			}, false);
+			//处理缩放结束
+		},
+		//下一张图片
+		next: function() {
+			var self = this;
+			self.mask.style.display = 'block';
+			self.index++;
+			var newItem = self.createImage(self.index, 'right');
+			setTimeout(function() {
+				self.currentItem.classList.remove('mui-imageviewer-item-center');
+				self.currentItem.classList.add('mui-imageviewer-item-left');
+				newItem.classList.remove('mui-imageviewer-item-right');
+				newItem.classList.add('mui-imageviewer-item-center');
+				self.oldItem = self.currentItem;
+				self.currentItem = newItem;
+				// TODO: 临时,稍候将调整
+				setTimeout(function() {
+					self.disposeImage();
+					self.mask.style.display = 'none';
+				}, 600);
+			}, 25);
+		},
+		//上一张图片
+		prev: function() {
+			var self = this;
+			self.mask.style.display = 'block';
+			self.index--;
+			var newItem = self.createImage(self.index, 'left');
+			setTimeout(function() {
+				self.currentItem.classList.remove('mui-imageviewer-item-center');
+				self.currentItem.classList.add('mui-imageviewer-item-right');
+				newItem.classList.remove('mui-imageviewer-item-left');
+				newItem.classList.add('mui-imageviewer-item-center');
+				self.oldItem = self.currentItem;
+				self.currentItem = newItem;
+				// TODO: 临时,稍候将调整
+				setTimeout(function() {
+					self.disposeImage();
+					self.mask.style.display = 'none';
+				}, 600);
+			}, 25);
+		},
+		//释放不显示的图片
+		disposeImage: function(all) {
+			var sel = '.mui-imageviewer-item-left,.mui-imageviewer-item-right';
+			if (all) sel += ",.mui-imageviewer-item";
+			var willdisposes = $(sel);
+			willdisposes.each(function(i, item) {
+				if (item.parentNode && item.parentNode.removeChild)
+					item.parentNode.removeChild(item, true);
+			});
+		},
+		//创建一个图片
+		createImage: function(index, type) {
+			var self = this;
+			type = type || 'center';
+			if (index < 0) index = self.images.length - 1;
+			if (index > self.images.length - 1) index = 0;
+			self.index = index;
+			var item = $.dom("<div class='mui-imageviewer-item'></div>")[0];
+			item.appendChild($.dom('<span><img src="' + self.images[self.index].src + '"/></span>')[0]);
+			item.classList.add('mui-imageviewer-item-' + type);
+			self.viewer.appendChild(item);
+			self.state.innerText = (self.index + 1) + "/" + self.images.length;
+			//重置初始缩放比例
+			self.scaleValue = 1;
+			self.dragX = 0;
+			self.dragY = 0;
+			return item;
+		}
+	});
+
+	$.imageViewer = function(selector, options) {
+		return new ImageViewer(selector, options);
+	};
+
+	$.ready(function() {
+		$.imageViewer('.' + imageClassName);
+	});
+
+}(mui, document));
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